Use este identificador para citar ou linkar para este item: https://repositorio.unichristus.edu.br/jspui/handle/123456789/1933
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Campo DCValorIdioma
dc.contributor.advisorCunha, Diana Araújo-
dc.contributor.authorSilva, Wanessa Pereira da-
dc.date.accessioned2025-06-30T17:11:11Z-
dc.date.available2025-06-30T17:11:11Z-
dc.date.issued2025-06-22-
dc.identifier.urihttps://repositorio.unichristus.edu.br/jspui/handle/123456789/1933-
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dc.description.abstractOs bisfosfonatos são compostos sintéticos amplamente utilizados por sua eficácia na inibição da reabsorção óssea, atuando por meio da indução de apoptose e inativação dos osteoclastos. Apesar de sua reconhecida ação terapêutica, esses fármacos podem provocar efeitos adversos, entre eles a osteonecrose dos maxilares, condição geralmente associada a procedimentos invasivos como extrações dentárias e tratamentos endodônticos. Nesse contexto, cresce o interesse por abordagens minimamente invasivas, como as terapias conservadoras da polpa dentária. O capeamento pulpar direto destaca-se como alternativa viável na preservação da vitalidade pulpar. Contudo, quando realizado em pacientes sob uso de bisfosfonatos, é essencial considerar o estado celular do tecido pulpar, uma vez que esses medicamentos podem comprometer os processos de reparo e regeneração. O objetivo deste estudo foi avaliar, por meio de modelo in vivo, a resposta inflamatória e reparadora da polpa e do periápice frente ao capeamento pulpar direto em animais previamente submetidos à administração sistêmica de bisfosfonato. Foram utilizados 36 molares inferiores de 18 ratos Wistar, distribuídos aleatoriamente de acordo com o material restaurador (MTA ou Cotosol) e o tipo de substância administrada (Ácido Zoledrônico a 0,20 mg/kg ou solução salina a 0,1 mL/kg). Os animais receberam quatro aplicações intravenosas da substância correspondente antes da execução do procedimento restaurador. Após o capeamento, os animais foram observados clinicamente, seguidos por eutanásia para análise histológica do tecido pulpar e das estruturas periapicais. A avaliação inicial das lâminas histológicas revelou ausência de dentina reparadora, necrose extensa e infiltrado inflamatório acentuado nos grupos tratados com Cotosol, independentemente da substância administrada. Por outro lado, os grupos nos quais foi utilizado o MTA demonstraram padrões variados, incluindo casos com necrose e inflamação intensa, mas também espécimes com resposta inflamatória leve e localizada, com deposição de tecido duro na região de exposição pulpar. Já os grupos tratados com MTA, mesmo na presença do bisfosfonato, não apresentaram alterações no periápice. Os resultados indicam que o MTA apresenta bom desempenho como agente de capeamento pulpar direto em condições experimentais que simulam o uso prévio de bisfosfonatos. Sua aplicação favoreceu respostas inflamatórias controladas e formação de tecido mineralizado, sem evidência de dano às estruturas periapicais. Dessa forma, o MTA pode representar uma estratégia promissora em terapias conservadoras da polpa dentária em pacientes que fazem uso de bisfosfonatos.pt_BR
dc.subjectBisfosfonatospt_BR
dc.subjectOsteonecrose da mandíbula associada a bisfosfonatospt_BR
dc.subjectCapeamento pulpar diretopt_BR
dc.titleAVALIAÇÃO DA RESPOSTA DO COMPLEXO DENTINO-PULPAR APÓS CAPEAMENTO DIRETO EM ANIMAIS SOB USO DE BISFOSFONATOS: PESQUISA CIENTÍFICApt_BR
dc.typeTCCpt_BR
dc.title.inglesEVALUATION OF THE RESPONSE OF THE DENTIN-PULP COMPLEX AFTER DIRECT CAPPING IN ANIMALS USING BISPHOSPHONATES: SCIENTIFIC RESEARCHpt_BR
dc.description.resumo_abstractBisphosphonates are synthetic compounds widely used for their effectiveness in inhibiting bone resorption by inducing apoptosis and suppressing osteoclast activity. Despite their well- documented therapeutic benefits, these drugs can lead to adverse effects, including bisphosphonate-related osteonecrosis of the jaws, a condition often associated with invasive dental procedures such as tooth extractions and endodontic treatments. In this context, the demand for minimally invasive dental approaches has increased, with conservative pulp therapies gaining attention. Direct pulp capping emerges as a viable alternative for maintaining pulp vitality. However, when this procedure is performed in patients undergoing bisphosphonate therapy, it is essential to consider the cellular condition of the pulp tissue, as these medications may impair the tissue’s reparative and regenerative capacity. This study aimed to evaluate, through an in vivo model, the inflammatory and reparative responses of the pulp and periapical tissues following direct pulp capping in animals previously treated with systemic bisphosphonate. A total of 36 lower molars from 18 Wistar rats were used, randomly allocated according to the restorative material applied (MTA or Cotosol) and the substance administered (Zoledronic Acid at 0.20 mg/kg or saline solution at 0.1 mL/kg). The animals received four intravenous applications of the assigned substance prior to the restorative procedure. Following pulp capping, the animals were monitored and subsequently euthanized for histological analysis of the pulp tissue and periapical region. Initial descriptive evaluation of the histological slides revealed absence of tertiary dentin formation, extensive pulp necrosis, and intense inflammatory cell infiltration in the groups treated with Cotosol, regardless of the administered substance. In contrast, the MTA groups showed variable responses, including some specimens with necrosis and significant inflammation, but also cases with mild and localized inflammatory infiltration near the pulp exposure area, accompanied by deposition of mineralized tissue. Additionally, periapical changes were observed only in the group treated with Cotosol combined with Zoledronic Acid. The MTA groups, even when associated with bisphosphonate administration, did not exhibit alterations in the periapical region. The results suggest that MTA performs well as a direct pulp capping material in experimental conditions simulating prior bisphosphonate exposure. Its use was associated with controlled inflammatory responses, mineralized tissue deposition, and no damage to periapical structures. Therefore, MTA may represent a promising strategy for vital pulp therapy in patients undergoing bisphosphonate treatment.pt_BR
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